Thanks for setting up this way of communication, Andy. It's awful how Facebook rules destroyed such a well working community just like that.
As I want to combine guitar playing with harmonica (mouth organ), I would like to hear/read/see some general rules. E.g., if I use my G harmonica, should I position the capo on the third fret?
Hey Les! Right idea here, but wrong execution. If you use a G Harmonica, you need to play chords in the key of G for it to sound right. These include G, Am, C, D, Em. More info on the key of G with song examples here! https://www.andyguitar.co.uk/online-lessons/lesson-1-what-is-a-key-in-music/